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 layout: default
 title: GDPPR-SNOMED subset analysis
 parent: GDPPR
+grand_parents: Data Insights
 nav_order: 1
 permalink: /docs/data_insights/gdppr/gdppr_snomed_subset_analysis
 ---
+
+# GDPPR-SNOMED Subset Analysis
+
+## Key Findings
+
+- GDPPR consists of a small proportion of the SNOMED universe (3.7%)
+- ‘Ethnic group’ and ‘Life style’ semantic tags show 60-80% coverage while all other semantic tags are below 25% with majority near 0%.
+- Descendant code coverage were higher (~90%) among ‘Medications’, ‘Patient factors’, ‘Vaccinations and immunisations’ and ‘Declines contraindications and other exceptions’ cluster categories but low (~40%) for ‘Diagnoses and findings’.
+- Coverage for codes mappable to CTV-3 were higher for ‘Respiratory disorders’ (60%) and ‘Neoplasms and cancers’ (40%) CTV-3 chapters. 
+
+## Datasets
+
+- SNOMED lookup
+- GDPPR Refset
+- GDPPR and descendants (derived from child-codes)
+- CTV-3 to SNOMED mapping
+
+## Coverage between datasets
+
+![Coverage between datasets](https://bhfdsc.github.io/documentation/assets/images/coverage_between_datasets.png)
+